I see this repeated a lot and I will say this probably is not real. The only evidence of this ever existing is from an anecdote Mark Millar told on a forum which has telephoned to oblivion. Supposedly on his own forum Mark Millar claimed he had submitted a pitch for a rape of wonder woman story as a joke to show how creatively bankrupt DC was during the Death of Superman, Knightfall, and Emerald twilight era. The only source for this is this
fandom lost media wiki article with no sources. The unsourced quote from Millar goes like this:
"I pitched this to DC for a laugh years back. The idea was that, like 'Death of Superman', we had 'Rape of Wonder Woman'; a twenty-two page rape scene that opened up into a gatefold at the end just like Superman did." Even assuming this unsourced quote is real no where does he say that DC attempted to publish this (it is purely an utterly unsourced claim on this sketchy wiki) nor does it say he ever wrote 22 pages of this or that someone drew it. A pitch in the comic world is in most cases (especially for an established writer like Millar) simply proposing an idea. Beyond this unsourced Miller quote there is no other evidence of this ever having been even proposed to DC so it may also be a made up story on Millar's end.
Looking at this story there are three possible options: Millar did pitch this to DC as a way to mock their trend of killing and maiming heroes for publicity, Millar makes this story up on his forums for laughs/to make fun of DC in the 90s, or this is entirely fake and Millar never said this. No where in any of these scenarios does Millar write a 22 page comic of Wonder Woman being raped and seriously pitch it to DC, no where does anyone actually draw this, and no where does DC seriously consider this. I learn towards this whole thing being fake as the only source people point to is this sketchy wiki which doesn't link Millar's supposed post, and I have never seen an actual screen shot or archive of this post. If one comes about I would say option 2 is more likely the 1 as no else has ever mentioned this. Sorry if this is too off topic I'm not trying to target you two in specific but I see this exact claim referenced by so many different people either in the context of mocking DC or accessing Millar of being a rape fetishist and no one questions how sketchy this whole scenario is with the lack of evidence. Remember kids don't trust random fandom wikis on the internet.